I can't use Neweeg.ca links, eh? So some general comments.
The build looks good except for the 460, 768MB. There's a significant difference in performance between that and the 460 1GB. Its not just a matter of more memory in this specific case, the board itself is faster.
So I'd recommend you step up to the 1GB 460, or the HD 6850 if you are not averse to AMD.
Presumably you are not OCing much if at all . . . no cooler. That's . . . cool So if you need to cut somewhere else to step up to the better vid card, look at G.Skill or Mushkin 1333 CL9 2x2GB memory kits. In the US they go for $60, they are both quality vendors, and you will not notice the difference.
If you still want faster memory, look at the same vendors, 1333 cl7 or 1600 CL9. Just as good and will save (progressively less) money.